Daniel davis



D. DAVIS.

VISE.

Patented Jan. 30, 1883.

Wl TJVESSES NITED STATES PATENT GEECE.

DANIEL DAVIS, OF ELMIRA, NEW YORK.

VISE.

SPECIFICATION forming part of Letters Patent No. 271,316, dated January30,1883.

Application filed October 16, 1882. (Nomodel.)

To all whom it may concern:

Be it known that I, DANIEL DAVIS, a citizen of the United States,residing at Elmira, in the county ot' Ghemung and State of New York,have invented certain new and useful Improvements in Vises; and l dehereby declare that the following is afull,clear, and exact descriptionot' the same, reference being had to the annexed drawings, making a partof this specification, and to the letters and iigures of referencemarked -thereon.

Figure l ot' the drawings is aperspective view of iny invention; Fig. 2,a longitudinal i vertical section ot the saine, and Fig. 3 a detailsectional view of one of the jaws.

This invention relates to certain new and useful improvements in vises,either for the use ot iron or wood workers; and the object thereof is toproduce such a visev whereby the long screw common to vises in generaluse is dispensed with and an instantaneous adjustment obtained withoutchanging hands, the work being held in one while the adjusting andclamping are performed with the other hand, without letting go ofeither, and bythe simplicity of construction and arrangement ot' theseveral parts a vise of my description isv as readily and cheaplymanufactured as those in common use, and by its ready adjustability isfar preferable. These objects I attain by the constructionsubstantially7 as shown in the accompanying drawings and hereinafterdescribed.

In the drawings, A B represent thejaws of a vise similar in appearanceto those of theordinary manufacture, but differing in construction. Thefront jaw, A, is provided with a recess, a, cored out to receive thefront end of a sliding bar, C, constructed preferably ot' wrought ormalleable iron and tapped to receive a shortscrew, D. This screw hasnear its end a smooth extension, b, terminating in a screw-threadednipple, c, which passes through a slide, E, working in a suitable sloud,in the sliding bar C, the inner end of the nipple being provided with anut, c, to preventthe slide E from moving ahead, and at the same timeholds the bead ot the screw snugly against the front jaw, A. The slide Eis provided upon each side with projecting tenons f, which receive theupper ends of lugs or braces F. The

lower ends ot' these braces, entering the recess a in the frontjaw, areheld in place by a pin, g, passing through said lugs 'or braces, andheaded upon the exterior sides of the said jaw. Thejaw A, upon theinterior sides ot therecess a, is provided with shoulders 71J just overthe lugs or braces F, said shoulders extending down on the saine anglethereof` to hold these lugs or braces in posit ion, and also to keep thejaw from pitching forward when the vise is being unscrewed. The slidingbarG is provided with a ratchet-plate, Gr, recessed in the bottomthereof and extending its entire length, said ratchet-plate beingpreferably ot' steel, with the teeth thereon tinely cut, in order toadmit of a nicety ot' adjustment. This ratchet-plate G engages with ashort ratchet, H, recessed in the rearjaw, B, near its front end, saidjaw being constructed to allow ot' the sliding bar C, provided with theratchet-plate G, sliding therein, and also admit the lugs or braces Fentering therein, the opening in which works this sliding bar being ofsufficient depth to allow of the same being raised or lit'ted out of theratch.

While I have described the ratchet-plate as engaging with a shortratchet recessed in the rear jaw, it is obvious that a pawl may be usedinstead of such ratchet, if desired.

The operation of my invention is'as follows: To open thevise,liltthcfrontjaw,A,until the ratchet-plate Gr upon the sliding bar C comesclear of the ratchetH in the rearjaw, B,when said sliding bar can bedrawn out the required distance for the insertionof the work betweenthese jaws, the sliding bar being pushed back or inwardly withoutlifting. At'ter the work has been placed between the jaws A B the screwD is turned so as to cause the slide E, having the lugs or braces Ftenoned thereto, to work in the slot d, thereby drawing the front jawtoward the rear, while the ratchet or pawl H holds the sliding bar Cfirmly in the position already attained, thereby clamping the workfirmly between the jaws ini a quick and thorough manner, without thenecessity of making but afew turns ofthe screw. Thus it will be seenthat the tighter the jawA is screwed up to the jaw B the less tensionthere is upon the ratchet-plate, as a great portion of the strain isdownward, causing the strain to bear in the bottom ot' the ratchet at anangle cessaand angular shoulders h, in combination of about forty-fivedegrees insted of on the with the braces F, the ratchet and ,slottedteeth of the ratchet. sliding` bar C, slide E,and nut e, substantially15 Having now fully described my invention, as and for the purposedescribed. 5 what I claim as new, and desire to secure by In testimonythat I claim the above I have Letters Patent, is` l hereunto subscribedmy name in the presence 1. In a vise, the ratcheted and slotted and oftwo witnesses. threaded sliding bar C, ratchet H, and screw D, incombination with the slide E, lugs or 1o braces F, and jaw A,substantially as and for -Witnesses: y the purpose specified. R. W.DAVIS, v y

2. In a vise, the jaw A, formed with the re- I J. N. WARD.

DANIEL DAVIS.

